I need help on this Phyiscs Problem.

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Which branches of natural science include the study of an organism that lived 10 million years ago